Regenerative reversing furnace.



L. L. KNOX.

REGENERATIVB REVERSING FURNACB.

APPLICATION FILED FEB. l'l, 1911. BENEWED FEB. 13, 1912. 1,038, 1 54, Patented sept. 1o, 1912.

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ma Ni A" gv* WITNESSES INVENTOR www# WW i j alms- L. L. KNOX. RBGBNBRATIVB RBVERSING PURNAGE. APPLICATION FILED PEB. 17, 1911. RBNBWED PEB. 13, 1912. 13,038, 154o Patented Sept. 10, 1912.

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UNITN 55555 INVENTCR 7,. x I

L. L. KNOX.

REGENERATIVE REVERSING FURNAGE.

l ArPLIoATIoN FILED 11.11.17, 1911. RENBWBD 11:13.13, 1912. 1,038, 1 54.

Patented Sept. 10, 1912.

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. .Univ/J1 full.. lille WITNEssEs Wala/@4W UNITED STATES 4PATENT oFFioE.

LUTHER L. KNOX, OF AVALON, PENNSYLVANIA, ASSIGNOR TO KEYSTONE FURNACE CONSTRUCTION COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA'.

REGENRATIVE REVERSING F'UBNACE.

Speoiiloation of Letters Patent.

Patented Sept. 10,1912.

Application illed February 17, 1911, Serial No. 609,205- Benewed February 13, 1912. Serial No. 677,385.

To all whom it may concern:

Be it known that I, LUTHER L. KNox, of Avalon, Allegheny county, Pennsylvania, have invented a new and useful Improvement in Regenerative Reversing Furnaces, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a longitudinal vertical section of one end portion of a furnace embodying my invention; Fig. 2 is a horizontal section of the same taken through the gas port; Fig. 3 is a perspective view, partly broken away, of the removable port cooler;` Fig. 4 is a horizontal section through the lower portion of the port cooler Fig. 5 is a' vertical longitudinal section of a modied form of the port cooler; and Fig. 6 is a section on the line VI-VI of Fig. 5.

My invention has relation to regenerative reversing furnaces, and is designed to provide means of novel character for cooling the gas ports of the furnace.

To this end the invention consists in a port cooler of the novel character hereinafter described.

Referring to the accompanying drawings, in which I have shown the preferred embodiment of my invention, the numeral 2 designates the supporting frame ofl a furnace of the o en hearth type; 3 designates a portion of tlie hearth, 4 the air uptakes leading upwardly from the regenerator connections 5 in an inclined direction, and communicating at their upper ends with the air port 6.

7 is the gas uptake leading upwardly from a regenerator connection 8, intermediate the air uptakes 4.

9 designates a wall or arch of refractory material separating the air ports 6 from the gas port 10, this wall or arch being a part of t e permanent construction of the furnace.

The gas port 10 is formed in a port cooler, which consists of a hollow metal shell having an arched top portion 11, depending parallel side portions or legs 12, and a bottom portion 13. This bottoni portion 13 extends only a portion of the length of the shell, and constitutes the bottom of the gas port, while the rear portion of the cooler back of the bottom 13 constitutes the upper portion of the gas uptake 7, being removably seated on the wallsA 14 of said uptake. The gas ort 10y discharges at its forward end direct yinto the furnace. The rear end of the cooler is closed by a removable end portion, which consists of a hollow. water-cooled plate 15 and an inner refractory lining 16.

The top ortion 11 of the cooler is formed with the s ew-backs 17, which support the refractory lining 18 for said top portion.' The side legs 12 of the cooler are provided with a refractory lining-18a; and the' bottom portion 13 has the refractory covering 19. The severalportions of the cooler may be supplied with waterby any suitable system of circulatin connections.

In the drawing have shown the top portion as having the two inlet pipes 20 extending longitudinally therein to a point near its forward end, and connected to a transverse spray pi e 21, having a plurality of spraying nozz es 22. 23 designates the outlet connection for said top portion. The side portions of the cooler are shown as supplied by means of pipes 24, extending longitudinally therein4 and connected at their inner ends to the vertically extending spray pipes 25. The bottom portion 13 is shown as supplied by the two longitudinally extending pipes 26 extending through the side legs and having their inner portions connected by the two transverse pipes 27 and 28. The pipe 27 has a plurality of spray nozzles 29 arranged to discharge against the front end of the cooling chamber, while the pipe 28 has a discharge T 30.

31 designates clean-out openings at the lower rear portion of the side legs, and at the lowest points of the structure. The side, end and bottom portions of the cooler referably form a continuous chamber, an the pipe 23 constitutes the common discharge for said chamber.

.The wall or arch 9 terminates some distance short of the inner end of the cooler, and the inner top portion of the cooler is preferably covered by a layer 32 of sand, or other similar material, which may be thrown thereon after the cooler is put in place. To permit access to the inner p0rtion of the cooler the side walls of the air ort 6 are preferably provided with the doors 33, one of which is shown in Fi 1, and which are normally closed by alse brickwork which can be readily removed.

A space. is left at each `ofthel cooler for the reception vof a llin 34 of sand, or

' other similar'ma'terial, as s own in Fig. 2.

These side spaces extend clear to the end of the furnace, so that the sand canbe readily' tamped or packed therein.

v35 are dead-airspaces'behind .the air 4 takes 4, which are closed at the top by lates 36 v(one of which is indicated in"` otted lines in Fi 1), and which have the false walls 37 ad] acent to the port cooler.

38'designates the circulating connections for thecooling plate 15 o f the bulk head.

aol

. instead of bemg of generally rectan las erabl -`formed by an arch 39 with a filling 40 o removable brick so that access to the port maybe readily obtained The entire port cooling structure maybe readily removed from underneath the wall or arch 9, and to facilitate this removal 'it is provided with the side plates 41 having the perforations 42 for engagement with a withdrawing means.4

The coolinglate 1 5 of the end wall or bulk head of t e gasport is sup orted on the outer wall 7 of the gas upta e." It is preferably provided with the skew-backs 43, to support the inner.l refractory lining '16; It isalso referably provided' with an opening, whi is normallyclosed bya removable block 44 of refractory material.

'In Fi 5 and 6 I have shown a modified form o 'the port-cooling structure, which,

gular form in cross-section, as is the first form descr1bed,1s,of clrcular form 1n cross-section with a continuous hollow cooling shell.

4'5`havin 4water-circulatin connections 46.

47 is the mner refractory lining, and 48 is adownwardl extending le which is supported on t e upper end o the Vwalls of the gas uptake. The outer end of this structure 1s closed by the removable end wall or bulk head, consisting of 'a hollow cooling plate 49 and an'inner refractorry lining'50.

I referably provide the'air spaces 35 withlbaflle plates or walls therein arranged to induce an air circulation which will assist in cooling the adjacent structure. Thesel bales may be variously arranged. In the drawings I have shown lateral baflfies 35d and a top b'aiiie'35b'.'

My invention provides a port cooling con- -5 5 struction, which canbe readily ap hed. to

and removed from a furnace, an which in itself constitutes those portions of the gas port which are subject to most rapid estruction in service. This port structure can be readily removed and replaced when necessary.

I do n'ot limit myself to the particular construction and arrangement of the parts which I have -herein shown and described, since it is obvious that various changes may be made in the details of the structure and arrangement without departing from the spirit-and scope lo fmyinvention as defined in the appended claims. 1

It will be understood vthat while I. have shown the invention as ap lied to butone end of the furnace, that 1n practice both ends will be preferably of similar construction. i

What Iclaim is 1. A regenerative reversing furnace havinga wall or arch Separating the, air and gas ports, anda removable gas portforfming and cooling structure.` forming the roo Thefront end of the air port 6 1s prefide walls of said port and inserted underneath said wall or arch, and havin a separately formed removable outer en -wall or bulk head; substantially as described.

42. A port forming and coolin structure .for furnaces, consisting of a ho low metal shell provided with water-circulating connection`s,'said shell having to bottom and depending side ortions, an a separately formed removab e outer end portion; substantially as described.

3. A regenerative furnace having gas and air ports, anda refractory wall or arch separatlng said ports, the gas ort being formed by a metal shell inser cndwise underneath the said wall or arch, and having hollow, top, bottom, and side portions surrounding rthe gas port; substantially as described.

4. v A regenerative furnacehaving gas and air ports, and a.- refractory wall or arch lseparating said ports, the gas port being formed by a. metalshell inserted endwise underneath the said wall or-arch, and having hollow, top,'bottom, and side portions surrounding the as port; the rear portion of said structure eing open at the bottom to constitute the upper portion of a gas uptake; substantiall as described.

5. VA gas port orming and cooling structure for furnaces, comprising a hollow metal shell extendmg from the mouth of the port to the rear wall of the gas uptake,

-and composed of top, bottom and side portions surrounding the gas port and having a rear part open at the bottom to constitute the upper portion of a gas uptake, together with a removable end wall or bulk head for closing the outer end ortion of the structure; substantiall as escribed.

6. A gas port orming and cooling structure for furnaces, comprising a metal shell having a top ortion, depending side portions and a o ttom portion shorter than the slde and to portions and connecting the side port-ions, a l of said portions bein hollow, and spra pipes extending an discharging therem at a ,plurality of different points; substantially as` described.

7. In a regenerative reversing furnace having gas and air ports, an arch or wall separating the gas and air ports, and a removable gas port forming and cooling structure inserted underneath said wall or arch, said structure having de ending side por- -tions forming the sides o the gas ort, the Wall or arch terminating short of t e inner end of the said structure; substantially as described.

8. In a regenerative reversing furnace having gas and air ports, an arch or Wall' separating the gas and air ports, a removable gas port forming and cooling structure inserted underneath said wall or arch, the Wall or arch terminating short of the inner end of the said structure, and a layer of relatively loose refractory material coverin the inner portion of said structure beyond the end of the wall o r arch; substantially as described. y

9. A regenerative reversing furnace, having laterally arranged air uptakes and a centrally arranged gas uptake, the furnace having laterally o en air spaces between the air uptakes, an means for inducing an air circulation in said spaces; 'substantlally as described. A

10. A regenerative reversing furnace having an air uptake and a as uptake, with a laterally ogen space at t e rear of the air uptake, an means for inducing an air circulation in said space; substantially as described.

In testimony whereof, I have hereunto set my hand.

LUTHER L. KNOX Witnesses: GEO. B. BLEMING,

R. A. BAmnnsoN. 

